Feature request: Plugin marketplace support

Feature Request

Add a plugin marketplace to Claude Code that allows users to discover, install, and manage plugins from a central registry.

Proposed Commands

/plugin marketplace add anthropics/claude-code
/plugin install frontend-design@claude-code-plugins

Use Case

This would enable:

• Easy discovery of community and official plugins
• Standardized installation from a central registry
• Version management for plugins
• Namespace support (e.g., org/plugin-name)